Improvements to local import testing

ts/services/backups/index.preload.ts

@@ -537,11 +537,26 @@ export class BackupsService {
     const { success, error } = result;
     if (success) {
       this.#localBackupSnapshotDir = snapshotDir;
+
+      if (!isTestOrMockEnvironment()) {
+        // Regenerate QR code without link & sync option
+        window.reduxActions.installer.startInstaller();
+
+        // eslint-disable-next-line no-alert
+        window.alert(
+          'Staged backup successfully. Please link to perform import.'
+        );
+      }
+
       log.info(
         `stageLocalBackupForImport: Staged ${snapshotDir} for import. Please link to perform import.`
       );
     } else {
       this.#localBackupSnapshotDir = undefined;
+      // eslint-disable-next-line no-alert
+      window.alert(
+        'Invalid backup snapshot directory; make sure you choose a snapshot directory (e.g. `signal-backup-2026-01-01-12-00-00`)'
+      );
       log.info(
         `stageLocalBackupForImport: Invalid snapshot ${snapshotDir}. Error: ${error}.`
       );

ts/textsecure/Provisioner.preload.ts

@@ -391,7 +391,7 @@ export class Provisioner {
       .toAppUrl({
         uuid,
         pubKey: Bytes.toBase64(cipher.getPublicKey().serialize()),
-        capabilities: isLinkAndSyncEnabled() ? ['backup4', 'backup5'] : [],
+        capabilities: isLinkAndSyncEnabled() ? ['backup5'] : [],
       })
       .toString();
 

ts/util/isLinkAndSyncEnabled.preload.ts

@@ -1,6 +1,7 @@
 // Copyright 2024 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
+import { backupsService } from '../services/backups/index.preload.js';
 import { everDone as wasRegistrationEverDone } from './registration.preload.js';
 
 export function isLinkAndSyncEnabled(): boolean {
@@ -9,5 +10,10 @@ export function isLinkAndSyncEnabled(): boolean {
     return false;
   }
 
+  // For local backup import testing, prevent link & sync
+  if (backupsService.isLocalBackupStaged()) {
+    return false;
+  }
+
   return true;
 }